Adding authentication and authorization flow

MainProject/Models/Settings/JWTSettings.cs

@@ -0,0 +1,12 @@
+namespace BasicDotnetTemplate.MainProject.Models.Settings;
+
+public class JWTSettings
+{
+#nullable enable
+    public string? ValidAudience { get; set; }
+    public string? ValidIssuer { get; set; }
+    public string? Secret { get; set; }
+    public int? ExpiredAfterMinsOfInactivity { get; set; }
+
+#nullable disable
+}